20021200202120 has 64 divisors (see below), whose sum is σ = 48803404849920. Its totient is φ = 7348176993024.

The previous prime is 20021200202119. The next prime is 20021200202239. The reversal of 20021200202120 is 2120200212002.

It is a junction number, because it is equal to n+sod(n) for n = 20021200202095 and 20021200202104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115189532 + ... + 115363211.

It is an arithmetic number, because the mean of its divisors is an integer number (762553200780).

Almost surely, 2^{20021200202120} is an apocalyptic number.

20021200202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021200202120 is an abundant number, since it is smaller than the sum of its proper divisors (28782204647800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021200202120 is a wasteful number, since it uses less digits than its factorization.

20021200202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230552934 (or 230552930 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20021200202120 its reverse (2120200212002), we get a palindrome (22141400414122).

The spelling of 20021200202120 in words is "twenty trillion, twenty-one billion, two hundred million, two hundred two thousand, one hundred twenty".